Research on Linear Sagnac Optic Fiber Speech Sensor and Noise Reduction

Xinzhong Xiong; Shengpeng Wan; Heng Liu; Xi Yin; Deng Xiao; Dezhuang Dong; Jizhou Sun

doi:10.3788/LOP202158.1106002

Laser & Optoelectronics Progress, Volume. 58, Issue 11, 1106002(2021)

Research on Linear Sagnac Optic Fiber Speech Sensor and Noise Reduction

Xinzhong Xiong¹, Shengpeng Wan^1,2、*, Heng Liu¹, Xi Yin¹, Deng Xiao¹, Dezhuang Dong¹, and Jizhou Sun¹

¹Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University, Nanchang , Jiangxi 330063, China

²Optical Fiber Sensing and Optical Fiber Communication Key Laboratory of Jiangxi Province, Nanchang Hangkong University, Nanchang , Jiangxi 330063, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(8)

Fig. 1. Optical fiber speech system based on linear Sagnac

Download full size

Fig. 2. Block diagram of improved spectral subtraction method based on multiwindow spectral estimation

Download full size

Fig. 3. Speech signal waveforms after different methods of noise reduction (SNR is 5 dB). (a) Original speech signal waveform; (b) speech signal waveform after adding noise; (c) basic spectrum subtraction; (d) multiwindow spectrum estimation method; (e) multiwindow spectrum estimation method based on endpoint detection

Download full size

Fig. 4. Diagram of the experimental setup

Download full size

Fig. 5. Physical image of the sensing ring

Download full size

Fig. 6. Time-domain waveform of speech signal. (a) Original speech waveform; (b) basic spectral subtraction method; (c) multiwindow spectrum estimation method; (d) multiwindow spectrum estimation method based on endpoint detection

Download full size

Fig. 7. Spectrograms obtained by different methods. (a) Original spectrogram; (b) basic spectral subtraction method; (c) multiwindow spectrum estimation method; (d) multiwindow spectrum estimation method based on endpoint detection

Download full size

Table 1. SNR of three noise reduction methods
View table
Table 1. SNR of three noise reduction methods
Original image Basic spectrum reduction Multi-window spectral Ours
0 10.8031 11.0864 12.5445
5 13.5648 14.7374 16.2280
10 15.8611 17.3395 19.3395

Tools

Get Citation

Copy Citation Text

Xinzhong Xiong, Shengpeng Wan, Heng Liu, Xi Yin, Deng Xiao, Dezhuang Dong, Jizhou Sun. Research on Linear Sagnac Optic Fiber Speech Sensor and Noise Reduction[J]. Laser & Optoelectronics Progress, 2021, 58(11): 1106002

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites